package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {
    @Autowired
    private DishFlavorService dishFlavorService;

    /**
     *新增菜品,同时保存对应的口味数据
      * @param dishDto
     */
    @Transactional
    @Override
    public void saveWithFlavor(DishDto dishDto) {
         //保存菜品的基本信息到菜品表
         this.save(dishDto);

         //获取菜品的id,同时它也是口味表的dish_id
        Long id = dishDto.getId();

        //菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
          flavors.forEach(item->item.setDishId(id));

//       flavors= flavors.stream().map((item)->{
//            item.setDishId(id);
//            return item;
//        }).collect(Collectors.toList());

        //保存菜品口味数据到菜品口味表dish_flavor
          dishFlavorService.saveBatch(flavors);

    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @Override
    public DishDto getByIdWithFlavor(Long id) {
        //查询菜品基本信息,从dish表查询
        Dish dish = this.getById(id);

        //new 一个dishdto表,把dish放进去
        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto);

        //查询当前菜品对应的口味信息,从dishFlavor查询
        LambdaQueryWrapper<DishFlavor> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(DishFlavor::getDishId,id);
        List<DishFlavor> list = dishFlavorService.list(wrapper);

        dishDto.setFlavors(list);
        return dishDto;
    }


    /**
     * 更新菜品信息
     * @param dishDto
     */
    @Transactional
    @Override
    public void updateWithFlavor(DishDto dishDto) {
       //更新dish表基本信息
        this.updateById(dishDto);

        //清理当前菜品对应口味数据---dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> wrapper = new LambdaQueryWrapper<>();
        Long id = dishDto.getId();
        wrapper.eq(DishFlavor::getDishId,id);
        dishFlavorService.remove(wrapper);

        //添加当前提交过来的口味数据
        List<DishFlavor> flavors = dishDto.getFlavors();
      flavors=  flavors.stream().map((item)->{
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());

      dishFlavorService.saveBatch(flavors);
    }


    /**
     * 删除操作
     * @param ids
     */

    @Override
    public void deleteWithFlavor(Long[] ids) {
        for (int i = 0; i < ids.length; i++) {
            Long id = ids[i];
            this.removeById(id);
        }

    }
}
